options ls=78;

data class4;

infile 'prac4b.txt';

input sn school $ motive anx pre post;

sqmotive=sqrt(motive);

lanx=log(anx);

pre3=pre**3;

post3=post**3;

tdiff=(post-pre);

sqtdiff=sqrt(tdiff+5);

run;

proc print data=class4;

run;

proc univariate data=class4 plot normal;

var motive sqmotive anx lanx pre pre3 post post3 tdiff sqtdiff;

title 'name, univariate normalizing';

run;

proc chart data=class4;

vbar motive sqmotive anx lanx pre pre3 post post3 tdiff sqtdiff / levels=15;

title 'name, histograms of data';

run;

proc means data=class4 n mean std clm alpha=.05;

var sqmotive lanx sqtdiff;

title 'name, looking at means and confid limits';

run;

proc sort data=class4;

by school;

run;

proc univariate data=class4 plot normal;

by school;

var motive sqmotive anx lanx pre pre3 post post3 tdiff sqtdiff;

title 'name, univariate normalizing when sort by school';

run;

proc chart data=class4;

vbar motive sqmotive anx lanx pre pre3 post post3 tdiff sqtdiff / levels=15;

title 'name, histograms of data when sorted by school';

run;

proc means data=class4 n mean std clm alpha=.05;

by school;

var sqmotive lanx sqtdiff;

title 'name, means and confid limits when sorting by school';

run;

quit;